Compound multiple FLA into one FLA

I’ve got over 4000 .FLA-files that’s containing one movieClip each.
What I want to do is to have one FLA-file, and put all the movieClips *(one from each FLA) *inside the library of that one FLA.

Manually this would take… hmm, let’s see… FOREVER!
Is there any fast way to make this process faster?

Really grateful for help!
Tompa